121313111 has 4 divisors (see below), whose sum is σ = 122848800. Its totient is φ = 119777424.

The previous prime is 121313107. The next prime is 121313117. The reversal of 121313111 is 111313121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121313111 - 2² = 121313107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767726 + ... + 767883.

It is an arithmetic number, because the mean of its divisors is an integer number (30712200).

Almost surely, 2^121313111 is an apocalyptic number.

121313111 is a deficient number, since it is larger than the sum of its proper divisors (1535689).

121313111 is an equidigital number, since it uses as much as digits as its factorization.

121313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535688.

The product of its digits is 18, while the sum is 14.

The square root of 121313111 is about 11014.2231228535. The cubic root of 121313111 is about 495.0350089173.

Adding to 121313111 its reverse (111313121), we get a palindrome (232626232).

The spelling of 121313111 in words is "one hundred twenty-one million, three hundred thirteen thousand, one hundred eleven".